今天，在通讯，交通，计算机技术前所未有的变化注入了新的动力。
Today, unprecedented changes in communications, transportation, and computer technology have given the process new impetus.
为了做出正确的选择，我们必须要明白地球现在的地球在人类历史上最前所未有的四种变化趋势
To make the right choice, we must understand four earth-changing trends unprecedented in human history
这些地图能前所未有的呈现每个地方的样子，以及该地的变化。
These maps provide an unprecedented view of what is where, and how it is changing.
冷战后，国际安全形势发生了前所未有的转折性变化。
After the Cold War, a transitional change had happened in the international security.
冷战后，国际安全形势发生了前所未有的转折性变化。
After the Cold War, a transitional change had happened in the international security.
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